物質

1. Origins, structure, and basic meaning

• Structure: 物質 is read as ぶっしつ and is a noun for matter or a substance with properties that occupies space.
• Basic usage: Testing substances that dissolve in water appears in 水に溶ける物質を調べる, while an unknown substance being in a box appears in 未知の物質が入っている.

2. Common pitfalls and similar expressions

• Properties and identity
  • It readily appears in scientific contexts that test a material’s properties or discuss an unidentified substance.
• Difference from 物体
  • This word focuses on material and its properties, whereas 物体 focuses on a discrete object with form and boundaries.